Technical information

SCI to SPI Peripheral Communication in V850ES Microcontrollers

CSI00_ReceiveData(rxbuf, 2); /* set up to receive two bytes */

CSI00_SendDone = MD_FALSE; /* set flag false - will be wset

true by INTCSI00 */

CSI00_SendData(txbuf, 2); /* transmit dummy data to start

transfer (number to receive) */

while (CSI00_SendDone == MD_FALSE)

; /* wait for CSI transfer done */

TEMP1_CS_OFF; /* deselect chip to allow conversion to start again

/* received data is now in rxbuf 0 and 1, with high byte, MSB first, in

rxbuf[0] */

/* and low byte in rxbuf[1]; clear 3 LSB to zero */

retval = (rxbuf[0] << 8) | (rxbuf[1] & 0xF8);

return (retval);

#endif

}

**---------------------------------------------------------------------------

** Abstract:

** Function to do Temperature Sensor 2 Read

** Parameters: None

** Returns:

** short (16-bit signed) temperature value * 128

**---------------------------------------------------------------------------

short Temp_Read_2(void)

{

#if (TEMP_DEBUG == 1)

unsigned short usi;

unsigned long ul;

short si;

usi = ADCR; /* read the A/D converter: 0000 - FFC0 */

ul = usi;

ul = (ul * (205 * 128)); /* scale full range to (0 - 205) * 16 * 8

ul = ul >> 16; /* scale to value plus 4 bits of

16th degrees plus 3 LSB */

ul = ul & 0xFFFFFFF8; /* mask 3 LSB to zero */

si = (short)ul; /* now as signed short number 0 -

205 */

si = si - (55 * 128); /* now signed short number -55 - 150 */

return (si);

#else

short retval;